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-- Mathematics - Section B2
Calculus
If $x^y=e^{x-y}, x> 0, $ then $\frac{dy}{dx}$ is equal to :
$-\left[\frac{log_ex}{(1+log_ex)^2}\right]$
$\frac{log_ex}{(1+log_ex)^2}$
$-\frac{log_ex}{1+log_ex}$
$\frac{log_ex}{1+log_ex}$